Darryl Gregory wrote:Dmitry Kitsov wrote:Frankly, I see rolling shutter on the footage with no pans. I even see it on a talking heads footage. So I understand the sentiment.
Sorry Dmitry, But that makes no sense, since rolling shutter is a well known aberration from all cmos sensors, and the fact the camera reads the image from top to bottom per frame causing the image to roll from top to bottom- thus causing what is called "ROLLING SHUTTER" there is no other reason for it, other than whipping your pans (As an Amateur) when you know it is expected to happen!
To the best of my knowledge the sensor in the BMPC-4K will be a CMOS sensor that has a global shutter. Rolling shutter is typical of most CMOS sensors, but not all.
Rolling shutter artifacts aren't only seen in too-fast pans.
They're also seen when the flash of a still camera goes off (such as at a wedding or other event, real or staged), resulting in what's called a "flash band", a bright white horizontal band across the frame, instead of a solid white frame.
Rolling shutter also causes objects moving in the frame to be distorted, such as a vehicle or train rushing by, to become slanted (distorted) and blurred instead of simply being blurred.
It also causes close-ups of rotating airplane propellers, wheels and other similar objects to look very strange.
RS also causes camera vibration, such as when the camera is mounted on a moving vehicle on a rough road, to be seen as a jello jiggling mess -- instead of the normal vibrating blur we expect to see with our own eyes.
Of course many techniques can be employed to minimize some undesirable RS effects. But these are not always practical, and may not be possible in some cases. In any event, they're pretty much unnecessary if a camera has a global shutter.
Hopefully the BMPC-4K's global shutter will handle these sorts of things well, without introducing too many compromises of its own.
We'll see.
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